Method and means for producing lantern-globes.



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METHOD AND MEANS FR EPEODUCIIG LANTEE-GLBS.

Laisser,

Specification of Letters Eatent. Palnted Aug., 29, lglll,

Application lied @etch/er 8, i917. Serial it' o. 295,942.

.i o all wilma it may conce/ra:

Be it known that l, innnn'r R. Gaorz, a

citizen of the United States ot America, and resident of Vllellsburg, county ot Brooke, and State ot lli/Test Virginia, have invented certain new and useful improvements in Methods and lli/leans for Froducing Lanternd Globes, of which the following is a specification. l

This invention relates to a .novel method and means for forming lantern globes and the like, and it has for its primary object to provide a method and means whereby me chanically perfect lantern globes oi uniform thickness throughout may be economically prod need.

iui""her object is to provide a method whereby tubular articles of glassware, such as lantern globes, may be mechanically blown and a perfectly uniform distribution as does the glass at points remote from said A end. rlhe result ofthis is that the blown article has a greater thickness at and adjacent` to the end from which it is blown than else- Where; or, if the Walls of the body of the u'are are made of a thickness which, corresponds to that of the end from which the blowing is performed, the same are of such undue thickness that they will not withstand the sudden expansion and contraction to 1which A they are subjected when the Ware is used for illuminating purposes. Further, due to the sudden chilling to which it is subjected in the blank-pressing mold, the glass at and adjacent to the mouth of the pressed blank is cracked and crushed in the pressing operation t0 such a marked extent that clearly perceptible crazelmarks or lines of Jfracture appear therein. Consequently, blown Ware which embodies therein the glass that is so injured is necessarily7 fragile and not Well suited for illuminating purposes.

lt is thepurpose of the present invention to obviate the objections above noted byA the provision of, a manufacturing method wherein only the most plastic and readily distributable portion of the lglass of the vpressed blank, Which is also the portion ,end troni which it is blown, said detachable portion, termed a bust-oni, being designed to contain the chilled and injured glass, permitting the utilization in the article of Ware oi that 'portion only of the pressed blank which retains a substantially'uniform heat and is readily workable by blowing. resultant article is of uniform thickness throughout, and, being machine blown, the Ware can be made uniformly ot any desired degree of thinness and Weight.

llt may here be pointed out that hollow glass articles have heretofore been made by hand blowing in paste molds in which it is required that portions be detached by scoring or by heating with a Wire or a llame to produce the finished Ware. However, the making of such articles With detachable portions has not had in View to provide for the removal of chilled and crushed portions at the open end, as in the present case, there being' no pressed blank used in forming hand-blown or pastemold Ware.

In the accompanying drawings, reference to which is had in the iollowingg` detailed description of my process- Figure l shows a mold and blank used in carrying out thefprocess and Fig. Q shows the blown article.

In carrying out my invention, l provide a blow mold A which is shaped interiorly and intermediate its ends to torno a. molding chamber l having Walls corresponding to the contour desired for the body of the article, as 2, to beformed therein, and also to provide a bottom receptacle 3 designed to receive the glass which constitutes the usual cap 4 which, when the' blown blank has passedthrough the lehr, must be severed from the bottom end, thereof. The mold is made of a height considerably greater than that of a mold in which like articles are formed by pressing or by hand-blowing, the excess height being-utilized at and adjacent to the mold mouth to provide a busteod container or chamber 5 of a length which shall be sucient to accommodate that portion of the mouth of 'the pressed blank 6 which is least plastic, due to rapid cooling, which The lil@

' seicl"beed and seid shouloer being designed to v'copeiate foi' holding said blank suspendedj wighin "bhe mold. Said chainbe which at," s'loweinosb pari; or ab the peine of its giietesb diametei eppoxiinaies the greatest diaineiei oiizhe lmolding chanibei l, is of subsbenbielly bell-shape, having its Walls ileied and descvibizfig: a wide curve, preferably of compound forni, from said shoulder 9 lo inwei'dly projecting annulai1 rib ll which sepaaes said chambers l and 5 and which oms a throat in Whlch is oiined neck l2 of the article lo be blo-Wn. ','he

e" leon o seid iib il is shaeply inolined considerable extent, extending mfom *bhe inoei' edge oi the mb to the Widest poi-"bien oi -bhe ehembe 5 as shown.

The pne'sse'd blank is made oi hollow eapezed forni end of gradually increasing eveil 'shiolness from its mouth to its lewe? end, and ib has a lengbh eppoXini-abing that oi enire molding space of h-e mold, Ugh-en seid blank has been intioduced in the mold and expanding air-pressure is ap plied in the usual manne' of nieohine blowing, *ehe glass is expanded into engagemen'; u-'ih die Wells of the mold, that poition of 1die glass which goes bo compose the aiiicle piep-ei being distributed evenly bhoughoub `blue molding chambei" l and pifoducing body 2 having Walls of subsentially Aunl- :oiin thiolfuess bhoughout and, due to `ghe even plasicity o said glass, practically free iioin impefiecbions. IThe uppezf end of 'the blank, which contains the glass which is ehilled and oehewiee injured, is expended ini@ the chamber 5, oiining the bus-o ln expanding@ form seid bust-od, fihe glass ii'efels bhoughout oonsideieble distance to lne Widest oi most iernoe poition of unbe? 5 1L it has engaged Jbe iib doein il oholie thus iesuiss and Kne is so sti'eohed that a web lef of eubreme, or papenlike, thinness is oimed in engagement with the inclined upper lace of seid iib. Thus the ,web le is readily iangible and, afee? the annealing operebion bo which the aizicle is subjected subsequent bo bhe blowing thereof, is bi'olzen Jso ieinove said bust-on?, the line oi 'ieotuie naiuielly occuriingin said web on at the angle between the neel; l2 and said Web il, the glass at said angle being; iendeied Jshin and breekable by the piovision oi" e shei'p edge ci" angle l5 at `this peine in the mold. 'lhe ough or bagged edge resuliin 'oin the ienioval of bhe bust-od, as aforesaid, is ieinoved oi smoothed oil by filing end geindiug, The cap e is removed 1n the usual :mannen What is claimed iisl. The heiein-desciibed method of' ineliing lantern globes, which consists in expanding a hollen1 pressed blank in a niacliine blow-inold to forni a globe body and en inegiial busoofi Wil-h a 'feletively thin ineligible web in-einiediate said bust-od and said body,

2. A mold foi' making lantern globes and the like, including a mold having a globeoiniing chambei` end a busool ohenibei 'theieim the latte? located adjacent bo the mouth of the mold, an inwardly piojecbing annulei` rib sepaigating said chambes, the inner edge oi? said rib being designed to shape the neel; of Vche globe, and `bhe upper face oi said ib being sharply inclined ioin said edge "so he peine oi gieabest diameter of s .id busted chamber, said iib end ehe upper Walls oi:l said bushoi? chamber being f so loca-bed iel'a'tively and the inclinabion oiq bhe uppei lace or the rib being such that a choke is produced which causes glass When expanded against the Walls of said busooii" chamber to be so l'sbieizched that the web iestiug upon the upper face of he bib will be :n testimony whereof, l eilix my signe'ure 

